The RAA223021 is a universal input AC/DC switching buck regulator with ultra-low standby power that features a 700V integrated MOSFET capable of delivering up to 12W output power. It supports output voltage as low as 5V.

The RAA223021 combines constant off-time control for heavy load and Pulse Frequency Modulation (PFM) for light-load operation. Constant off-time controls switching frequency above the audible frequency around 43kHz. PFM eliminates any potential audible noises while offering superior light-load efficiency and ultra low power consumption (<20mW at no load). The efficiency is achieved up to 80%. The built-in frequency dithering further reduces EMI noise spectrum.

The RAA223021 also features input brownout protection that prevents input circuitry from the overcurrent at low input voltage, and hiccup protections for output fault conditions such as short-circuit, overload, overvoltage, and open feedback.

The RAA223021 is available in a small 7 Ld SOIC package.


  • Ultra-low standby power (<20mW)
  • No audible noise
  • Low quiescent current (<80μA)
  • Output voltage as low as 3.3V
  • Low EMI with frequency dithering
  • 7 Ld SOIC package
  • Programmable PFM allows optimization of COUT for various standby power requirements
  • Protection features: Short-Circuit Protection (SCP), Overload Protection (OLP), Overvoltage Protection (OVP), open feedback protection, and Over-Temperature Protection (OTP).




  • Home appliances
  • Home automation, IoT, and sensors
  • Metering and Industry control
  • Bias power


Type Title Date
Datasheet PDF 877 KB
Brochure PDF 5.49 MB 日本語
Other XLSX 982 KB
3 items

Design & Development

Software & Tools

Software & Tools

Software title
Software type
iSim:PE Offline Simulation Tool
iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
Simulator Renesas
1 item

Boards & Kits

Boards & Kits


RAA2230xx Non-Isolated AC/DC 700V Buck Regulator Family

The innovative RAA2230xx family of 700V non-isolated AC/DC buck regulators delivers ultra-low-power consumption, excellent noise and EMI suppression, as well as reduced overall system cost for a wide range of applications, including home appliances, sensing systems, white goods, power meters and industrial controls.